Classification ...

Which group of elements does not show diagonal relationship?

Which of the following properties is nearly same for two families?
Family-1; Be, Mg, Ca, Sr........
Family-2; He, Ne, Ar, Kr........

Which one of the following order is not in accordance with the property stated against it?

The electronic configuration of the element which is just above the element with atomic number 43 in the same periodic group is :

Many properties of an element and its compounds can be predicted from the position of that an element in the periodic table. What property could not be predicted this way?

The given diagram represents _________.

According to Mendleev's periodic law which properties of the elements are the periodic function of their atomic masses?

Which of the following statements is incorrect about the trends in periodic properties in the periodic table ?

An element M belongs to the group 1 and period 3 of the modern periodic table. Out of the following statement, which is the true about 'M'?

The element having electronic configuration $[Kr]4d^{10}\, 4f^{14}\, 5s^2\, 5p^6\, 5d^1\, 6s^2$ belongs to :